body {
  font-family: 'Open Sans', sans-serif;
  font-size: 14px;
  font-weight: normal;
  line-height: 1.2em;
  margin: 15px;
}

#app {
  margin-left: auto;
  margin-right: auto;
  width: 850px;
}

#ads {
  margin-left: auto;
  margin-right: auto;
  width: 728px;
}